在使用crypto-js进行解密的时候，有可能会报错：
Malformed UTF-8 data Error: Malformed UTF-8 data at Object.stringify (d:\StudeyCode\myStudy\encryptDemo\routes\encrypt\crypto-js.js:478:27) at WordArray.init.toString (d:\StudeyCode\myStudy\encryptDemo\routes\encrypt\crypto-js.js:215:41) at decryptByDESModeCBC (d:\StudeyCode\myStudy\encryptDemo\routes\encrypt\crypto.js:90:22) at testSign (d:\StudeyCode\myStudy\encryptDemo\routes\test.js:34:18) at Layer.handle [as handle_request] (d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\layer.js:95:5) at next (d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\route.js:137:13) at Route.dispatch (d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\route.js:112:3) at Layer.handle [as handle_request] (d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\layer.js:95:5) at d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\index.js:281:22 at Function.process_params (d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\index.js:335:12)报错的原因是： des解密时,如果加密数据不是8的整数倍就会报上述错误，
解决办法：将数据加密后，再进行base64进行加密,解密时首先通过base64进行解密，然后再进行des解密。即可解决上述问题。